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Photons in potential fields

  1. Jul 24, 2011 #1

    DeG

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    Are photons effected by traveling through electric or gravitational potential differences? If so, how so?
     
  2. jcsd
  3. Jul 25, 2011 #2
    Photon is not charged. So it is not affected by the electric field.

    Photon has energy, so does responds to gravitation potential different. It can gain/loss energy and therefore red/blue shift.
     
  4. Jul 25, 2011 #3

    DeG

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    Does the electric field component of em waves not interact with electric fields and likewise with the magnetic component? Also, could I get the mathematics behind the blue and/ or red shift of light do to gravitation?
     
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